Tektronix WFM 601A, Service Manual

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Performance Verification
WFM 601A, WFM 601E, & WFM 601M Service Manual
4–21
centered on the 700 mV line with video gain set to 75% 2% (73.5 to
76.5%).
l. Select RESET on the serial component generator touch screen.
m. Select the Signal Sets button on the serial component generator.
20. RGB Gamut limit
REQUIREMENT – Positive detection level = 735 mV 7 mV.
Negative detection level = –35 mV 7 mV.
a. Set the serial component generator output to the Gamut Limit signal:
Modules DVG1
Signal Sets 525–270
Test Signals Monitor
Monitor Gamut Test
b. Connect a 75
W
cable through a 75
W
feed-through termination, from the
Y/G MON OUT on the waveform monitor to the test oscilloscope CH 1
vertical input.
c. Select the Gamut display mode on the waveform monitor.
d. Enter the Config Gamut menu and set GAMUT CHECK to RGB and
ALARM DISP to BOTH.
e. Select the following parameters on the test oscilloscope.
Coupling DC
Volts/Div 100 mV
Trig Source CH 1
Sweep 10
m
s
f. Adjust the trigger level for a locked display.
g. Use Vert position on the test oscilloscope to view the top of the
waveform.
h. CHECK – that the positive gamut strobe pulse is flashing at the center
one minor division.
i. Use Vert position on the test oscilloscope to view the bottom of the
waveform.
j. CHECK – that the negative gamut strobe pulse is flashing at the center
one tic mark.
k. CHECK – that an RGB ERR appears at the lower left on the waveform
monitor display.